/*
 * Copyright (C) 2001-2019 Jacek Sieka, arnetheduck on gmail point com
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef DCPLUSPLUS_DCPP_SSL_H
#define DCPLUSPLUS_DCPP_SSL_H

#include "w.h"
#include "typedefs.h"

#include <openssl/ssl.h>
#include <vector>
#include <cstdint>

#ifndef SSL_SUCCESS
#define SSL_SUCCESS 1
#endif

namespace dcpp {

namespace ssl {

template<typename T, void (*Release)(T*)>
class scoped_handle {
	public:
		explicit scoped_handle(T* t_ = nullptr) : t(t_) { }
		~scoped_handle() {
			if (t) {
				Release(t);
			}
		}
		
		operator T*() {
			return t;
		}
		operator const T*() const {
			return t;
		}
		
		explicit operator bool() const {
			return t ? true : false;
		}
		
		T* operator->() {
			return t;
		}
		const T* operator->() const {
			return t;
		}
		
		void reset(T* t_ = nullptr) {
			Release(t);
			t = t_;
		}
		
		scoped_handle(scoped_handle&& rhs) : t(rhs.t) {
			rhs.t = nullptr;
		}
		scoped_handle& operator=(scoped_handle&& rhs) {
			if (&rhs != this) {
				t = rhs.t;
				rhs.t = nullptr;
			}
			return *this;
		}
		
	private:
		scoped_handle(const scoped_handle<T, Release>&);
		scoped_handle<T, Release>& operator=(const scoped_handle<T, Release>&);
		
		T* t;
};

typedef scoped_handle<ASN1_INTEGER, ASN1_INTEGER_free> ASN1_INTEGER;
typedef scoped_handle<BIGNUM, BN_free> BIGNUM;
typedef scoped_handle<DH, DH_free> DH;
typedef scoped_handle<DSA, DSA_free> DSA;
typedef scoped_handle<EVP_PKEY, EVP_PKEY_free> EVP_PKEY;
typedef scoped_handle<RSA, RSA_free> RSA;
typedef scoped_handle<SSL, SSL_free> SSL;
typedef scoped_handle<SSL_CTX, SSL_CTX_free> SSL_CTX;
typedef scoped_handle<X509, X509_free> X509;
typedef scoped_handle<X509_NAME, X509_NAME_free> X509_NAME;

// functions that operate with file paths - here in order to support UTF16 Windows paths
bool SSL_CTX_use_certificate_file(::SSL_CTX* ctx, const char* file, int type);
bool SSL_CTX_use_PrivateKey_file(::SSL_CTX* ctx, const char* file, int type);

X509 getX509(const char* file);
ByteVector X509_digest(::X509* x509, const ::EVP_MD* md);

}

}

#endif
